<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>页面B</title>
	</head>
	<body>
		<a href="three.html">跳转页面C</a>
		<br>
		<button type="button" onclick="a()">前进</button>
		<button type="button" onclick="b()">后退</button>
		<br>
		<button type="button" onclick="c()">刷新</button>
	</body>
	<script type="text/javascript">
		function a(){
			history.go(1);
		}
		function b(){
			history.go(-1);
		}
		function c(){
			location.reload();
		}
	</script>
</html>
